Earlier quoted context omitted.
In high school we would screenshot the windows 98 desktop, make it the wallpaper, hide everything, and watch people fluster about.
In high school I replicated the entire login UI of NT LAN manager (I think it was called) and had it save the password and then crash the machine (via c:\con\con). Asked the teacher to login for something and tada, admin password. If you ever wondered why you have to press ctrl-alt-del to log in, that is why (nobody ever fixed this for Linux).
Seems you're not familiar with Linux. It had SAK since forever.